diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c
index 19762f3476aadd22289d4ddb4a44d82985465bf4..1678b6c757ec717d40d298c32ebe3cdceb669cd8 100644
--- a/drivers/s390/char/vmcp.c
+++ b/drivers/s390/char/vmcp.c
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2004,2005 IBM Corporation
- * Interface implementation for communication with the v/VM control program
+ * Interface implementation for communication with the z/VM control program
  * Author(s): Christian Borntraeger <cborntra@de.ibm.com>
  *
  *
diff --git a/drivers/s390/char/vmcp.h b/drivers/s390/char/vmcp.h
index 87389e730465f379ce768e38cea39cfc9458c25d..8a5975f3dad7ce7b7e1442d1cfa32993329edb01 100644
--- a/drivers/s390/char/vmcp.h
+++ b/drivers/s390/char/vmcp.h
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2004, 2005 IBM Corporation
- * Interface implementation for communication with the v/VM control program
+ * Interface implementation for communication with the z/VM control program
  * Version 1.0
  * Author(s): Christian Borntraeger <cborntra@de.ibm.com>
  *